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Finding the Fourth Proportional to 139,388.76, 209,091.12 and 39,541.14

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Solution

The fourth proportional to 139,388.76, 209,091.12 and 39,541.14 is: 59,313.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,388.76 : 209,091.12 = 39,541.14 : x
  2. Step 2: Convert to fraction form
    139,388.76/209,091.12 = 39,541.14/x
  3. Step 3: Cross multiply
    139,388.76x = 209,091.12 × 39,541.14
  4. Step 4: Simplify right side
    139,388.76x = 8,267,701,248.68
  5. Step 5: Solve for x
    x = 8,267,701,248.68/139,388.76
  6. Step 6: Final answer
    x = 59,313.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.